2004-2005 Honda TRX450R Factory Sevice Manual, Page 169Get this manual
CYLINDERPISTON
CYLINDERPISTON INSTALLATION
PISTON RING INSTALLATION
Caref ully nstall the pis to rings nto he piston ri ng rooves with he ar ks fac ing up NO E:
Do no co nfuse th top and second rings To install the oi ri ngnstall the space firstthen inst all the side railsSta gg er th pi ston rin end gaps 120" apart from each ot her Stagger he side rail end gaps as shown